High-energy-density secondary lithium-ion battery

Abstract

The present invention provides a high-energy-density secondary lithium-ion battery, including: a lithium-ion cell, a steel shell, a protection IC, an integrated IC, resistors, capacitors, an inductor, a MicroUSB interface, a plastic structural part, a square rigid FR-4 substrate, a circular rigid FR-4 substrate and a metal cap, for integrating three functions of a constant voltage output, charge management and protection, overcharge and overdischarge protection, and overcurrent protection. Compared with the prior art, the large-capacity secondary battery of the present invention can achieve multi-functional integration of the battery, and also can save the space occupied by accessory structural parts of the battery and achieve a high energy density of the battery, and is also conducive to improving the reliability.

Description

FIELD OF THE INVENTION[0001]The present invention relates to a high-energy-density secondary lithium-ion battery, in particular to a secondary rechargeable lithium-ion battery that integrates multiple functions of a constant voltage output, a MicroUSB interface, charge management and charge protection, and battery protection (including overcharge protection, overdischarge protection, and overcurrent protection), and has a high energy density.BACKGROUND OF THE INVENTION[0002]With the development of secondary lithium-ion battery technology, the performance of secondary lithium-ion batteries has been improved rapidly, and the cost thereof has also dropped significantly. Secondary lithium-ion batteries have the advantages of a high energy density and a long life, and thus are applied more and more widely. At present, secondary lithium-ion batteries have become the main power supply batteries for mobile phones, notebook computers, cameras and portable mobile power packs, and in many trad...

AI Technical Summary

Benefits of technology

The present invention is a secondary lithium-ion battery with high energy density. Compared to prior art, its energy density can increase by about ⅔. The battery has a constant output voltage during power output, and also has charge management and protection, discharge undervoltage protection, charge overvoltage protection, charge overcurrent protection, discharge overcurrent protection, short circuit protection and a micro-USB interface. This battery is suitable for scenarios where a rechargeable battery is used in place of a primary battery. The battery is novel in structure, simple in fabrication, meets requirements of multi-functional integration, structural reliability, and process operability, and can achieve an energy density increase of about ⅔ as compared with the prior art.

Problems solved by technology

However, compared with a primary battery, a secondary battery still has much inconvenience in use.

Thus, if voltage management is not performed on the secondary lithium-ion battery, generally it cannot be directly applied to an electrical device using the primary battery.

Otherwise, the electrical device may be damaged.

However, in the existing method for arranging accessory structural parts, usually a large amount of internal space of the battery is occupied thereby, so that it can only use a small-size low-capacity cell, which results in that the integrated secondary lithium-ion battery's energy density advantage is not obvious yet as compared with the primary battery.

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